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Discussion Starter #1
How much oil consumption is considered normal for a rebuilt engine during the break in period?
How long does the average break in period take?
What could contribute to excessive oil consumption on a newly rebuilt small block?
Is there a right or wrong way to break in a rebuilt engine?

'79 coupe
383 SBC
Holley 750
3:30 gears
Richmond 5 Speed
 

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IMO....use 20-50 for break in during summer running...and don't worry about a damn thing untill 3000 miles....YMMV......run the piss outta that thing....don't go crazy, for 500 or so miles, but after that, no super reason to be kind and gentle either....let er rip....

IMO, systhetics reduce wear, fine, but during break in, their slickness contributes to blow by, and you be smoking up a storm under there forcing seals and crap too....

it took my 355 here about 3000 miles to finally stop smoking/using oil...been fine since then....

and I know this is weird, but a trip to 250f on the way home pinging like a bastard, REALLY sealed it up good....not one ounce of oil gone between changes since.....go figger.....

HOT running is NOT recommended BTW....just a chance observation...

sample of ONE.....

:crazy: :devil: :thumbsup: :cheers:
 

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Discussion Starter #3
"YMMV" ??? Please elaborate.

How much oil would you expect to lose in let's say, 100 miles, or 500 miles after a rebuild?

What kind of consumption is considered normal and what is excessive?
 

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"YMMV" ??? Please elaborate.

The provenance of the YMMV is from the EPA mpg estimates on new cars...they used to pub Your Mileage May Vary on it....sneaky disclaimer...



How much oil would you expect to lose in let's say, 100 miles, or 500 miles after a rebuild?

My damn engine used like a quart ever couple hundred miles, then gradually went to qt/500 then finally it got seated in....I forget what the rings were, I know the slugs are forged TRW, not sure of the rings , but Iknow they are not cromealoy....

What kind of consumption is considered normal and what is excessive?
Well the factories consider up to a quart every 500? miles acceptable...I don't...I consider a quart every 2000-3000 ok, but not great....

I like to see no noticeable losses between oil / filter changes every 3000 miles

like my wife's little 2 liter Escort got 140k on it, and every 3-4000 miles, it's o/f time.....oil clean as new, valve cover clean as new, engine runs fine, happy as a clam....and you don't see no socks on HER car either, cause she run 'em off, that's why.....

knock on wood....

now this is all more or less 'normal' street driving....we cruise at 80 mph here in Florida....and I was doing 95 indicated MPH, (I know the speedo is accurate at 60/70 mph, so I have to beleive it, I think, but i'm getting passed around like a hooker at a poker rally....

but it's normal street driving.....too long ago for me at any tracks, so I can't comment about that....don't remember....
 

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Well the factories consider up to a quart every 500? miles acceptable...I don't...I consider a quart every 2000-3000 ok, but not great....

I like to see no noticeable losses between oil / filter changes every 3000 miles

like my wife's little 2 liter Escort got 140k on it, and every 3-4000 miles, it's o/f time.....oil clean as new, valve cover clean as new, engine runs fine, happy as a clam....and you don't see no socks on HER car either, cause she run 'em off, that's why.....

knock on wood....

now this is all more or less 'normal' street driving....we cruise at 80 mph here in Florida....and I was doing 95 indicated MPH, (I know the speedo is accurate at 60/70 mph, so I have to beleive it, I think, but i'm getting passed around like a hooker at a poker rally....

but it's normal street driving.....too long ago for me at any tracks, so I can't comment about that....don't remember....

IS THIS A DREAM OR REALITY ....
 

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IS THIS A DREAM OR REALITY ....
Talking about the Florida typical highway speeds....?? I would assume so...

all I can say is, let others here in Florida speak their piece when/if they spot this thread....ask around in various groups....

I fail to see just HOW my speedo can be way the hell over indicating at say 80 mph....and be dead nutz on at 60 and 70 as confirmed by wife/friends by hand signals and matching speeds running side/side....

I agree it seem silly, and I have enquired about speedo linearity of response before and got nothing back....so U tell ME....

course I running with top down most of the time, and that acts to accentuate the feel of speed, BUT, the speedo says what it says....

:WTF :cheers:
 

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Talking about the Florida typical highway speeds....?? I would assume so...

all I can say is, let others here in Florida speak their piece when/if they spot this thread....ask around in various groups....

I fail to see just HOW my speedo can be way the hell over indicating at say 80 mph....and be dead nutz on at 60 and 70 as confirmed by wife/friends by hand signals and matching speeds running side/side....

I agree it seem silly, and I have enquired about speedo linearity of response before and got nothing back....so U tell ME....

course I running with top down most of the time, and that acts to accentuate the feel of speed, BUT, the speedo says what it says....

:WTF :cheers:

Man I talking oil not speed I don,t know if any c3 speedo are correct.
 

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Somehow we got way off topic here. :thud:
All I trying to do is describe the type of driving, speeds, distances, and the heat here....all this can have an affect on oiling, engine break in, etc....

a trip across town is 60 miles ONE WAY...crow flies....serious....

largest city area wise in the USA....which was shocking to me when I moved here....


:thumbsup: :thud:
 
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